"I would imagine that the American Mongols would soon be in Australia to watch over their neophyte chapter."

Mr Katsogiannis says the mass conversion is a win for both the Finks and the Mongols.

"What it means now is that they get that international expansion... it also allows them to grow at a faster rate and gain more power.

"On the other hand, it also allows the Mongols to get a strong foothold here in Australia," he said.

Some believe the move is designed to get around a Supreme Court move in Queensland to declare the Finks a criminal organisation.

"From the intelligence we have at hand at the moment, that about 90 per cent of the Finks have patched over... we do believe that the entire Finks in South Australia, Western Australia, and Queensland have all patched over to the Mongols," Mr Katsogiannis said.

"In New South Wales, there's still a number of chapters that have not patched over,"

Long history of bikie gang warfare

The Mongols were founded in California after the Vietnam War, originally because the Hells Angels would not accept Hispanics.

Mr Valdemar says the two gangs have been involved in a bloody war of attrition ever since.

"Many, many murders occurred," he said.

"Bombings, huge fights, and they're not afraid to take on law enforcement as well."

Qld anti-bikie laws include:

Extra powers for Qld's Crime and Corruption Commission (CCC)

Bikie-only prison at Woodford, north of Brisbane

Mandatory sentences of 15 years for serious crimes committed as part of gang activity, on top of the normal penalty

Club office bearers will be sentenced to another 10 years in jail, and parole will only be granted if the offender cooperates with police

Introducing a licensing regime for tattoo parlours and artists, banning bikie gang members

Motorcycles to be crushed as punishment for certain crimes

Mr Valdemar is a 30-year veteran of the war against Californian organised crime.

He says while most gangs think they are the most dangerous of all the clubs, the Mongols actually have a legitimate claim to the title.

In 2008, a grand jury indictment named more than 60 Mongols as part of an undercover federal investigation into the gang's criminal activities.

Agents from the federal Alcohol Tobacco and Firearms agency infiltrated the Mongols and gathered detailed accounts of their dealings.

It described how the Mongols tortured a man for three hours by breaking his knuckles with a pair of pliers, breaking his knee with a metal pipe and kicking him with steel capped boots as he tried to escape.

The gang engaged in hate crimes against African-Americans and a bizarre sexual reward game where members would perform specific sexual acts at events called wings parties.

The wings would indicate various sexual practices that members had performed in the presence of other members who could verify them.

Members were given a red, purple or green coloured wings patch that corresponded to each act.

The acts included having sex with a female who was menstruating, sex with a corpse or sex with a woman who had venereal disease.

Anti-bikie measures ramped up

In states across Australia, law enforcement is ramping up anti-bikie measures to meet the new threat.

South Australian Attorney-General John Rau wants any foreign Mongols stopped at the border.